Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf78882182a9a81…

MALICIOUS

PDF

72.4 KB Created: 2021-02-19 16:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a0447a539793c84ebbca409507d5fafb SHA-1: 008db07788922acbc85a44ef2f7304b79a39dcfd SHA-256: 1bf78882182a9a81eaff0947f72ce1a5a5c7feca596e7edea0e776b01dc08f84
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=minecraft+sweet+and+awesome+free+unblocked In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465388/normal_5fc8184562f6c.pdfIn PDF document text
    • http://masozaxo.22web.org/66329781772.pdfIn PDF document text
    • https://dakubotamijez.weebly.com/uploads/1/3/2/7/132712147/a836d0cfb4c05ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_6002ee62cb0c2.pdfIn PDF document text
    • http://dapunajav.22web.org/30390909988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5fd374fd508bf.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/20df4ec1c87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusaloxu.epizy.com/nixupivowupager.pdfIn PDF document text
    • http://lutaxipokujopej.epizy.com/asura_bgm_ringtone_free_isaimini.pdfIn PDF document text
    • http://zalinejogimi.rf.gd/bahut_khubsurat_ho_song_ringtone.pdfIn PDF document text
    • http://tutapivemaki.rf.gd/45814428728.pdfIn PDF document text
    • http://limazajot.rf.gd/96463295924.pdfIn PDF document text
    • http://nujidurib.rf.gd/hypertension_management_guidelines_jnc_8.pdfIn PDF document text
    • http://jimibidubarabus.epizy.com/69606936231.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/xaniwuveriwejipisikot.pdfIn PDF document text
    • http://xilidutajomode.epizy.com/logarithmic_functions_word_problems_worksheet_with_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 5468 bytes
SHA-256: 1c1a0ae5b9ff7bb7a9a02c5abf7b82eebef1a3cfb33f4ab76cd2a10fa13c4914
font_01_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 10568 bytes
SHA-256: 0376f36044f1fa42fcc5a069381eda71ff73ee2cbd342b75fee418f5b0a18007